Improved asymmetrical honeycomb monolith catalyst prepared using a 3D printed template.

Area of Science:

• Materials Science
• Chemical Engineering
• Catalysis

Background:

• Honeycomb monoliths are widely used as catalytic supports.
• Conventional designs with straight channels can limit reaction efficiency due to laminar flow.
• Optimizing monolith structure is crucial for enhancing catalytic performance.

Purpose of the Study:

• To fabricate and evaluate an improved honeycomb monolith with asymmetrical channels.
• To compare the catalytic performance of the novel monolith with a conventional straight-channel design.
• To investigate the impact of channel geometry on reaction kinetics and fluid dynamics.

Main Methods:

• Fabrication of asymmetrical and conventional honeycomb monoliths using 3D printing.
• Loading of Copper/Ceria (Cu/Ceria) active phase onto the monolith supports.
• Characterization of the supported catalysts using SEM-EDX, Raman spectroscopy, and XRD.
• Testing catalytic activity for CO oxidation and preferential CO oxidation (CO-PROX) reactions.

Main Results:

• SEM-EDX, Raman, and XRD confirmed similar Cu/Ceria active phase distribution on both monolith types.
• The catalyst supported on the asymmetrical monolith achieved higher conversions in both CO oxidation and CO-PROX reactions.
• The asymmetrical channel design demonstrated improved reaction rates and favored turbulent gas flow over laminar flow.

Conclusions:

• The improved honeycomb monolith with asymmetrical channels offers significant advantages over conventional designs.
• The enhanced structure leads to higher catalytic efficiency by optimizing reaction kinetics and fluid dynamics.
• This novel monolith design presents a promising advancement for catalytic applications, particularly in CO oxidation and CO-PROX.